Home / 643,217,066.72-887,399,090.16-378,737,421.92

Finding the Fourth Proportional to 643,217,066.72, 887,399,090.16 and 378,737,421.92

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Solution

The fourth proportional to 643,217,066.72, 887,399,090.16 and 378,737,421.92 is: 522,516,054.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,217,066.72 : 887,399,090.16 = 378,737,421.92 : x
  2. Step 2: Convert to fraction form
    643,217,066.72/887,399,090.16 = 378,737,421.92/x
  3. Step 3: Cross multiply
    643,217,066.72x = 887,399,090.16 × 378,737,421.92
  4. Step 4: Simplify right side
    643,217,066.72x = 336,091,243,621,352,064
  5. Step 5: Solve for x
    x = 336,091,243,621,352,064/643,217,066.72
  6. Step 6: Final answer
    x = 522,516,054.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.